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Heberle DA, Levine ZH.Heberle DA, et al. Among authors: levine zh.J Res Natl Inst Stand Technol. 2013 Aug 15;118:375-80. doi: 10.6028/jres.118.018. eCollection 2013.J Res Natl Inst Stand Technol. 2013.PMID: 26401438Free PMC article.
Levine ZH, Cockayne E.Levine ZH, et al.J Res Natl Inst Stand Technol. 2008 Oct 1;113(5):299-304. doi: 10.6028/jres.113.023. Print 2008 Sep-Oct.J Res Natl Inst Stand Technol. 2008.PMID: 27096129Free PMC article.
Levine ZH.Levine ZH.J Res Natl Inst Stand Technol. 2006 Dec 1;111(6):429-33. doi: 10.6028/jres.111.033. Print 2006 Nov-Dec.J Res Natl Inst Stand Technol. 2006.PMID: 27274945Free PMC article.
Levine ZH.Levine ZH.J Res Natl Inst Stand Technol. 2002 Aug 1;107(4):319-25. doi: 10.6028/jres.107.025. Print 2002 Jul-Aug.J Res Natl Inst Stand Technol. 2002.PMID: 27446733Free PMC article.
Kalukin AR, Winn B, Wang Y, Jacobsen C, Levine ZH, Fu J.Kalukin AR, et al. Among authors: levine zh.J Res Natl Inst Stand Technol. 2000 Dec 1;105(6):867-74. doi: 10.6028/jres.105.067. Print 2000 Nov-Dec.J Res Natl Inst Stand Technol. 2000.PMID: 27551641Free PMC article.